Home Java Java-methods Invoke Method in Java

Invoke Method in Java
Posted on: November 15, 2008 at 12:00 AM

In Java, java.lang.reflect.*; package is required to import in the program to invoke the methods.

Invoke Method in Java

In Java, java.lang.reflect.*; package is required to import in the program to invoke the methods. As you can see here we are using reflect method, this could be either a class method or instance method and the usage of methods in Java is to access a single method either on class or interface. This example will show you, how to declare and invoke the methods in Java.

Code for Java Method - Invoke


import java.lang.reflect.*;



public class InvokeMethod {

public int add(int a, int b)

{

return a + b;

}

public static void main(String args[]){

try {

Class cla = Class.forName("InvokeMethod");

Class partypes[] = new Class[2]; 

partypes[0] = Integer.TYPE;

partypes[1] = Integer.TYPE;

Method method = cla.getMethod(

"add", partypes);

InvokeMethod invoke = new InvokeMethod();

Object arg[] = new Object[3];

arg[0] = new Integer(30);

arg[1] = new Integer(40);

arg[2] = new Integer(50);

Object object = method.invoke(invoke, arg);

Integer integer = (Integer)object;

System.out.println(integer.intValue());

}

catch (Throwable e) {

System.out.println(e);

}

}

}

Output will be displayed as:

Invoke Method Java

Download Source Code

Related Tags for Invoke Method in Java:
java, c, class, ui, interface, import, methods, method, port, using, instance, int, this, package, invoke, usage, program, to, ram, require, single, ref, ld, lan, e, it, can, ul, im, ce, in, as, sta, m, nt, sage, ca, j, pack, ace, cl, es, age, me, pro, ack, s, ee, ess, pac, k, is, ir, and, ar, cc, rt, sa, usa, va, s, s, th, av, st, access, face, either, pr, nd, ods, on, ogr, o

«Previous Index Next»